The documentation on the chunked methods suggests that these methods are related to the existing chunks(ofSize:) method proposed separately. That proposal has been up for over a year without any progress. The functionality proposed there would fit in with the functionality present in the Algorithms package, and I suspect would have been included here if it had not already been proposed separately.
Would it make sense to consider pulling the chunks(ofSize:) functionality into Algorithms (and closing the separate Evolution proposal) so it can get the same sort of real-world testing the other functionality is getting? We'd want to get agreement from the original author of the other proposal, of course.